Great information to know, I don't recall seeing anything about that in the Owner's Manual. Thanks.How many miles do you have on the car where you felt the need to change plugs? It's not the plugs though. See below.
The reason you want to disconnect the battery when changing plugs is because the positive battery cable has a main fuse that is easily shorted out when you change plugs. Something the original poster found out the hard way.
It's not a fuse under the hood but rather a main fuse attached to the positive batter cable. That's what you shorted out causing all your problems. It's like a $50.00 part.